Free Data Analysis Tools for Researchers and Analysts
Statistics calculators and text analysis tools that run in your browser. No sign-up, no uploads, and your data never leaves your device.
Popular tools this week
These six do the jobs researchers come here for most often: planning a survey sample, choosing a test, checking a scale and summarising text.
KAP Survey Sample Size Calculator
How many people to interview, with design effect and non-response built in.
Which Statistical Test Should I Use?
Answer a few questions and get the right test, with its assumptions.
T-Test Calculator
Compare two groups or two measurements, with confidence interval and effect size.
P-Value Calculator
Turn a z, t, chi-square or F statistic into an exact p-value.
Cronbach’s Alpha Calculator
Check the reliability of your questionnaire and see which items weaken it.
Word Cloud Generator
Turn interviews and survey answers into a word cloud you can download.
Statistics & Research Tools8 tools
Plan your sample, test your scale, run common tests and describe your data with calculators built for researchers, students and analysts.
KAP Survey Sample Size Calculator
Plan the sample for KAP and household surveys, with design effect and non-response adjustments.
Cronbach’s Alpha Calculator
Check the internal consistency of your questionnaire scale and see which items weaken it.
Regression and PLS-SEM Sample Size Guide
Compare Green, 10-times, inverse square root and power-based minimum samples.
P-Value Calculator
Get an exact p-value from a z, t, chi-square or F statistic.
T-Test Calculator
Independent, paired and one-sample t-tests with confidence intervals and effect size.
Which Statistical Test Should I Use?
Answer a few questions and find the right test for your data.
Correlation Calculator
Pearson and Spearman correlation with a scatter plot and confidence interval.
Standard Deviation Calculator
Mean, median, mode, variance and standard deviation in one step.
Qualitative & Text Tools5 tools
Explore interviews, open-ended survey answers and documents. Count words, see keywords in context, check sentiment and surface recurring themes.
Word Cloud Generator
Turn any text into a word cloud you can download as an image.
Word Frequency Counter
Count words and phrases, remove stop words and export to CSV.
Keyword in Context Viewer
See any word or phrase alongside the text around it.
Sentiment Checker
Check whether text reads positive, negative or neutral.
Theme Finder
Spot recurring themes in interviews and open-ended survey answers.
How the tools work
Every tool follows the same simple pattern, so you can get a result in under a minute.
Choose a tool
Pick a calculator or text tool from the menu above, grouped by statistics and qualitative analysis.
Add your data
Type your settings or paste numbers and text straight from Excel, Word or your transcripts.
Read the result
Get clear numbers, tables and plain-language notes, with sample data to show how it works.
Use it in your work
Download CSV or image files, and copy the figures into your report, thesis or proposal.
Built for researchers, students and organisations
Free, private and explained clearly, so you can use the results with confidence.
Private by design
Everything runs in your browser. Your data and text are never uploaded or stored.
Free, with no account
No sign-up, no trial period and no limit on how often you use a tool.
Works on any device
Clean layouts that work on phones, tablets and desktops, in light or dark mode.
Made for research
Tools for KAP surveys, scale reliability, sample size, tests and qualitative text.
Explained, not just calculated
Each page covers the method, a worked example and how to report the result.
Expert help on hand
When a calculator is not enough, our analysts can take on the full analysis.
Frequently asked questions
Are the data analysis tools really free?
Yes. All tools are free to use with no registration, and there is no limit on how often you use them.
Is my data safe?
Yes. Everything is calculated in your browser, so your data never leaves your device.
Can I cite the results in my thesis?
Yes. The tools use standard formulas that are described on each page. For official reporting we recommend confirming results in your main statistical software.
Which tool should I start with?
If you are not sure which statistical test fits your data, start with the test finder. For planning a survey, start with the KAP survey sample size calculator.
Can you analyse my data for me?
Yes. Contact us to discuss statistical analysis, qualitative analysis, data cleaning or business intelligence dashboards.
Do the tools work on my phone?
Yes. Every tool is designed to work on phones and tablets as well as desktops. You can paste data from a spreadsheet or type values directly, and the results appear below the form.
How accurate are the calculators?
They use standard formulas and well-tested numerical methods, and results match common statistical software for the main outputs. Methods that rely on approximations, such as the power-based sample size, say so on their pages. For official or published results, confirm in your main software.
Can I use the results in a commercial or organisation report?
Yes. You can use the numbers you generate in theses, papers, proposals and business reports. We appreciate a mention or a link to the tool, but it is not required.
Can I suggest a new tool?
Yes. Tell us what you need through the contact page. We build new tools based on what researchers and analysts ask for most.